As oblique rotation was used and factors were moderately correlated, these were overestimates of the total variance explained and therefore must be interpreted with caution (Tabachnick and Fidell, 2001).
Table 1.
Factor analysis for the final 30 item USDI
Factor
Communalities
1 2 3 Initial Extracted
Factor 1: Lethargy
1. I am more tired than I used to be .74 .07 .11 .48 .44
4. I do not have the energy to study at my usual level .72 .05 .12 .64 .65
9. My energy is low .67 .07 .00 .54 .50
13. I find it hard to concentrate .61 .04 .32 .69 .67
16. I don't feel rested even after sleeping .56 .15 .03 .52 .43
18. Challenges I encounter in my studies overwhelm me .49 .12 .13 .49 .41
21. My mood affects my ability to carry out assigned tasks .46 .25 .06 .48 .42
24. Daily tasks take me longer than they used to .44 .31 .03 .51 .44
28. My study is disrupted by distracting thoughts .44 .16 .24 .54 .47
Factor 2: Cognitive/Emotional
2. I wonder whether life is worth living −.15 .85 .01 .67 .61
5. I feel worthless −.02 .76 .08 .67 .62
7. I have thought about killing myself −.10 .74 .08 .60 .46
10. No one cares about me −.14 .70 .01 .42 .41
11. I feel emotionally empty .29 .58 .12 .59 .51
14. I feel sad .32 .57 .10 .54 .53
15. I worry I will not amount to anything .07 .57 .16 .52 .48
17. The activities I used to enjoy no longer interest me .13 .55 .09 .51 .45
19. I feel like I cannot control my emotions .24 .51 .07 .54 .49
20. I spend more time alone than I used to .13 .51 .02 .44 .36
22. I feel disappointed in myself .18 .49 .26 .64 .57
25. I feel withdrawn when I'm around others .20 .49 .12 .50 .46
26. I do not cope well .34 .46 .16 .67 .62
29. I think most people are better than me .26 .44 .09 .54 .44
Factor 3: Academic motivation
3. I do not have any desire to go to lectures .02 .00 .68 .50 .45
6. I don't attend lectures as much as I used to .08 .04 .67 .44 .39
8. I don't feel motivated to study .40 .04 .58 .65 .66
12. Going to university is pointless .14 .20 .52 .41 .33
23. I have trouble starting assignments .30 .02 .50 .49 .45
27. I do not find study as interesting as I used to .33 .02 .49 .56 .50
30. I have trouble completing study tasks .39 .08 .44 .61 .57
Note: N = 308. Factor loadings are in italics. Factor loadings are unique loadings (pattern matrix).
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